The Glock 17 Gen4 introduces revolutionary design changes to the world's most popular pistol. The Modular Back Strap design lets the user instantly customize the grip to adapt to hand size, and the frame surface exhibits the scientifically-designed Gen4 rough textured technology. This model features a new dual-recoil spring assembly that substantially increases the life of the system, and the enlarged reversible magazine catch easily accommodates left or right-handed operators. The G17 Gen4 retains the Glock accessory rail for accessory attachment.